hello bikrantha mandal,

as your son secured a rank of 29633 rank in t he paper-1 and 4279 rank in the paper-2

it is very good

better way is let your son get particapated in the coounselling of the MAINS and also let him write the comp exam also

but your son have to register when the josaa annouces the date or else you dont have another chance to join the counselling

all the best to your son